Now i noticed another strange i deactivated the memory balloon option from the VM hosted engine and tried to update the values again with the same memory it still keeps the value of memory size at 5120 while the value of physical memory guaranteed it changed to what we desire at the 8192 value and then the error appears again in the vm engine i ckecked the engine log file it shows the same errors! is there are other logfile locations that can give us any clues ?